A town once dominated by Mugen has been split into 5 districts dominated by the gangs Sannoh Rengokai, White Rascals, Oya Kohkoh, Rude Boys and Daruma Ikka. Mugen's grip on the town ended after the legendary Amamiya Brothers refused to submit to their will. The 5 gangs that comprise S.W.O.R.D. fight for their pride and glory, but the mysterious Mighty Warriors appear.